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DELTEC DELCOM-3222 RS-232C/RS-485
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RPSTECH DMP10.24
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SAM ELECTRONICS DEM401
SAM ELECTRONICS DEM401

DELTEC DELCOM-3222 RS-232C/RS-485

Product Name:​ DELCOM-3222 RS-232C to RS-485 Isolated Serial Communication Module
Manufacturer:​ DELTEC / DELTE (Industrial Automation Division)
Product Category:​ Industrial asynchronous serial converter / galvanic isolator
Category:
Description
Key Features:
  • Converts RS-232C (DB9 male) to RS-485 (2-wire half-duplex, screw terminal A/B/GND)
  • Built-in 120 Ω termination resistor (enable/disable via DIP switch)
  • Automatic TX/RX direction control for RS-485; RTS/CTS support for RS-232
  • Galvanic optical isolation between ports and power supply
Technical Specifications:
  • Interface:​ 1 × RS-232C (DB9), 1 × RS-485 (screw terminal block)
  • Baud Rate:​ 300 bps – 115.2 kbps (software or DIP selectable)
  • Data Format:​ 5/6/7/8 data bits; 1/1.5/2 stop bits; None/Odd/Even parity
  • Isolation Voltage:​ 2500 VDC / 3000 VDC (model dependent, optocoupler)
  • RS-485 Load Capacity:​ Up to 32 standard unit loads (expandable with repeater)
  • Max Distance (RS-485):​ approx. 1200 m with shielded twisted pair
  • Power Supply:​ 9–30 VDC (typical 24 VDC), reverse polarity protected
  • Current Consumption:​ ~50 mA @ 12 VDC
  • Surge Protection:​ Built-in TVS diodes and ESD protection
  • Indicators:​ PWR (green), TXD/RXD (yellow)
  • Operating Temp:​ -20 °C to +70 °C (some versions -40 °C to +85 °C)
  • Mounting:​ 35 mm DIN rail
  • Dimensions (typ.):​ 72 × 100 × 25 mm (W × L × H)
  • Certifications:​ CE, FCC, RoHS
Applications:
  • PLC-to-sensor / smart meter Modbus RTU networking
  • HVAC controller interfacing
  • Marine & industrial data acquisition gateways
  • Connecting legacy RS-232 equipment to RS-485 multidrop bus
Installation Notes:
  • Install 120 Ω termination only at the two physical ends of the RS-485 bus
  • Use shielded twisted-pair cable; ground shield at one end only
  • Ensure correct A/B polarity; swapping A/B will prevent communication
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